<template>
    <div class="app-container">
        <el-form label-width="120px">
            <el-form-item label="讲师名称">
                <el-input v-model="teacher.name"/>
            </el-form-item>

            <el-form-item label="讲师排序">
                <el-input-number v-model="teacher.sort" controls-position="right" :min="0"/>
            </el-form-item>

            <el-form-item label="讲师头衔">
                <el-select v-model="teacher.level" clearable placeholder="请选择">
                    <!--
                    数据类型一定要和取出的json中的一致，否则没法回填
                    因此，这里value使用动态绑定的值，保证其数据类型是number
                    -->
                    <el-option :value="1" label="高级讲师"/>
                    <el-option :value="2" label="首席讲师"/>
                </el-select>
            </el-form-item>

            <el-form-item label="讲师资历">
                <el-input v-model="teacher.career"/>
            </el-form-item>

            <el-form-item label="讲师简介">
                <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
            </el-form-item>

            <!-- 讲师头像 -->
            <el-form-item label="讲师头像">
                <!-- 头衔缩略图 -->
                <pan-thumb :image="teacher.avatar"/>
                <!-- 文件上传按钮 -->
                <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像</el-button>
                <!--
                v-show：是否显示上传组件
                :key：类似于id，如果一个页面多个图片上传控件，可以做区分
                :url：后台上传的url地址
                @close：关闭上传组件
                @crop-upload-success：上传成功后的回调 -->
                <image-cropper
                    v-show="imagecropperShow"
                    :width="300"
                    :height="300"
                    :key="imagecropperKey"
                    :url="BASE_API+'/eduoss/fileoss'"
                    field="file"
                    @close="close"
                    @crop-upload-success="cropSuccess"/>
            </el-form-item>

            <el-form-item>
                <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
            </el-form-item>
        </el-form>
    </div>
</template>
<script>
import * as teacherApi from '@/api/edu/teacher'
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'

export default {
    components: { ImageCropper, PanThumb },
    data() {
        return {
            teacher:{
                name: '',
                sort: 0,
                level: 1,
                career: '',
                intro: '',
                avatar: ''
            },
            //imagecropperShow 上傳彈窗組件是否顯示
            imagecropperShow:false,
            imagecropperKey:0,
            BASE_API:process.env.VUE_APP_BASE_API,

            //按鈕是否禁用
            saveBtnDisabled:false
        }
    },
    created(){//頁面渲染之前執行
        console.log('created')
        this.init()
    },
    watch: {
        $route(to, from) {
            console.log('watch $route')
            this.init()
        }
    },
    methods:{
        //關閉上傳彈窗
        close(){
            this.imagecropperShow = false
            this.imagecropperKey = this.imagecropperKey + 1
        },
        //上傳成功方法
        cropSuccess(data){
            this.imagecropperShow = false
            this.teacher.avatar = data.url
            this.imagecropperKey = this.imagecropperKey + 1
        },
        init(){
            //判斷路徑中是否含有id，含有則做更新
            if (this.$route.params && this.$route.params.id) {
                const id = this.$route.params.id
                this.getInfo(id)
            } else {
                //沒有id做的添加
                //清空表單
                this.teacher = {}
            }    
        },
        //根據老師ID查詢數據的方法
        getInfo(id){
            teacherApi.getTeacherInfo(id)
                .then(response => {
                    this.teacher = response.data.teacher
                })    
        },
        //更新老師信息
        updateTeacherInfo(){
            teacherApi.updateTeacher(this.teacher)
                .then(response => {
                    //提示信息
                    this.$message({
                    type: 'success',
                    message: '修改成功!'
                    });
                   
                   //回到列表頁面 路由跳轉
                   this.$router.push({path:'/teacher/table'})
                })
        },
        saveOrUpdate(){
            //根據 teacher 對象中是否有id來判斷是修改還是添加
            if (this.teacher.id) {
                //修改記錄
                this.updateTeacherInfo()
            } else {
                //添加記錄
                this.saveTeacher()
            }
        },
        saveTeacher(){
            teacherApi.addTeacherId(this.teacher)
                .then(response => {
                    //提示信息
                    this.$message({
                    type: 'success',
                    message: '添加成功!'
                    });
                   
                   //回到列表頁面 路由跳轉
                   this.$router.push({path:'/teacher/table'})
                })
        }
    }

}
</script>
